/*
 * This file is Copyright 2002-2006 Loyola University Chicago,
 * Department of Computer Science and the Emerging Technologies Laboratory.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License via
 *    http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.citep.web.gwt.dto;

public class HistoryEncoder {
	public static String encode(String module_name, Integer objectId) {
		String token = null;
		if(objectId == null)
			token = "__" + module_name + "__";
		else
			token = "__" + module_name + "__" + objectId + "__";
		return token;
	}
	
	public static Integer getObjectId(String encoded) {
		
		if(encoded == null)
			return null;
		
		String [] tokens = encoded.split("__");
		
		if(tokens.length < 3)
			return null;
		
//		return Integer.parseInt(tokens[1]);
		return new Integer(tokens[2]);
	}
	
	public static String getModule(String encoded) {

		if(encoded == null)
			return null;
		
		String [] tokens = encoded.split("__");

		if(tokens.length < 2)
			return null;

		return tokens[1];
	}
}
